Heating apparatus



C. W. BREWER HEATING APPARATUS Sept. 4, 1923-.

2 shets-sheet 1 Filed Nov* 26 1921 \NVENTOK FIG 1 R m Ew w E E m w. o s T T m A m CTH B Sept.'4, 1923.

C. W. BREWER HEATING APPARATUS 2 sheets-sheet d Nov. 26.

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Patented Sept. 4, 1923.

UNITED HEATING APPARATUS.

` Application filed November 2e, 1,921. "serial No. 518,034.

10 all 'whom t may concern:

Be it known that I, CARLOS W. BREWER, a citizen of the United States, resident of Minneapolis, county'of Hennepin, State of Minnesota, have invented certain new and useful Improvements in Heating Apparatus, of which the following is a specification.

The object of my invention is to provide a heating lapparatus, which will dispense entirely with the manual stoking of the furnace or boiler and the equally laborious and more disagreeable operation of removin ashes from the furnace.

A fur-ther object is to provide an apparatus of the class described which will be positive and reliable in operation, automatically controlled, if desired, and comparatively inexpensive to install. l

The invention consists generally in various constructions and combinations, all as hereinafter described and particularlyx pointed out in the claims.

In the accompanying drawings forming part of this specification, I

Figure l is a side elevation of a heating apparatus embodying iny invention,

Figure 2 is a plan view of the same,

Figure 3 is a detail view o-f the mechanical stoker, illustrating the controlling mechanism therefor,

Figure 3a is a detailed view of the switch device and the connected parts,

Figure 4 is a front view of the same,

Figure 5 is a vertical sectional view, showing the iirepot in its relation to the walls of the heater and the means for establishing a forced draft therethrough,

Figure 6 is a side view of the suction fan casing connected with the heater.

In the drawing, 2 representsI a suitable bearings 10 and having a pinion 1l thereon 5 is a casingk connected through a'train'of gears .l2 'with l the shaft 13 lof a suction fan`l4 that isy driven through a belt `15 from a motor 16V preferably electric.y From this construction A whenthe motor is driven the suction fan -will be set in motion andthrough the train of gears the coal buckets will be moved to gather up and lift the coal. A ratchet gear n ratchet and prevent backward movement of the belt. A flue 19 depends within a drum 2O and circulating pipes 21 are arranged within said drum'and connected through supply and return pipes 22 and 23 with suitablecoils or radiators, notshown, and between these pipes circulating passages or flues 24yare formed for the products Ofcombustion, ysaid passages being so arranged that the products' of combustionl are com-k pelled to' ow in a tortuous manner `up andv down through the drum between the pipes before reaching the open end of the Hue 19 and escaping. I lhave shown a conventional forin of drum with circulating iues or passages, but it will be understood it may' be varied in many ways. At one side of the drum I provide a firebox 25 communicating through a flue open-A ing 26 with the adjacent passage 24 in the drum'. In the bottoml of this rebox Il ari range a gate 26 hinged at 27- andnormally` closing thelower portion of the box against the discharge of ashes or fuel therein. This box with the gate 26 forms in effect a repot. Beneath thel gate 26 is a'discharge pipe 27 through which the ashes. descend by gravity to a suitable receptacle 28.` vIn the upper par-t ofthe irebox'is a gate 29 hinged at 3() and normally extending across the 'topl of the irebox and closing the passage thereto.` Both the gates 26y and 29 are normally held in theirclosed position by springs 31 and 318@ Above the gate 29 l is a pipe 32 havingan opentop in position to receive the fuel from lthe fuel buckets as they are inverted in p-assing around the f. 1,457,083 T" y:IfITHJI-Z'Qf and 29 automatically, I prefer to employ the following described mechanism. 33 is a bell crank, pivoted at 34 vron a suitable support 35. One arm of the bell crank projects into the path of a stud 36 on the fuel elevating belt, as indicated in Figure 4. rlhe other arm of'the bell crank is loosely connected by a rod 37 with the arm 38 on the gate 26 so that when the elevating fuel belt reaches a predetermined point itwill positively open the gate 26 and allow the accumulation of aslies in' the firebox to drop down' by gravity into the ,receptaclebeneath.' As soon as the operating stud passes the bell crank 33, the spring 3l will return the gate to its closed position.' A 'similar bell crank 33a is provided at a point yhigher up on the support 35 and also in the path f the stud 36, one arm of the bell crank 33?L being connected by a rod` 3W? with a crank 382L on the upper gate or valve 2S) so that when the movement of the fuel belt operates the bell crank 33n it will positively open the upper gate 29 and allow the accumulation of fuel on this gate to droplinto the fire'box beneath. As soon as this operation takes place, the gate 29 will be automatically returned to its closed position, shutting olf further admission of fuel into the fire ox.

Near one'i'side of the firebox l provide a gas burner 39 having a valve 40 of the rotary type positioned to allow a sufficient amount ofv gasto pass through at all times to form a piloty light and adapted to open through the movement of the crank 41 to a full position and permit the passage of sufficient gas to forin a'large flame, and project through an opening in the wall of the lirebox, and ignite the` fuel therein. A bell'crank 42 is mounted inthefpath of the stud 3,6 and has one arm connected 'by a rod 43 with the crank 40 so that at apredetermiiied point in the movement of the fuel elevating belt the gas valve will be opened for a suflicient length of time to, ignite the body of fuel in the firebox. The length of time necessary for this purpose will be determined, of course, by experiment and practice, but may be varied under different conditions of fuel and size of the fire hox. All this can be determined when the installation is made. A spring 44 is provided for returning the bell cranl.: to its normal position and cutting olf a greater portion of the gaswhen the operating stud is moved to a point where the bell crank is yreleased and the fuel in the lirebox has become ignited.

lI pnefer to provide means for automatically controlling the movement of the motor 16. Suitable conductors 45 and 46 are connected with the, motor, one of them extending` to the service line and the other to a binding. post 47 fixed at some suitable point, preferablyon the support 35. A similar conductor 48y leads from the service line to another binding post 49. Contact springs 50 and 5l are mounted on these binding posts and have end portions for contact with each other to close the circuit between the posts or break the circuit when the springs are separated. Normally, with each complete revolution of the fuel feeding belt the stud 36 will contact with the spring 50 and force it inwardly out of contact with the spring 5l, thereby breaking lthe circuit and stopping the operation of the motor and the feed of the fuel. ln some cases, however, it may be desirable for the operator to continue the automatic feeding ol the fuel and l therefore mount anarm 52 on the contact spring 5l with a connection leading to an operating motor controlled from a thermostat (not shown) if desired, or having a manual connection through which a pull may be exerted on the connection 53 to tilt it from ther full line position in Figure 3 to the dotted line position in the same ligure, and thereby force the contact spring inwardly against the surface of the spring 50 and continue the closed circuit and the operation of the fuel feeding apron even a ter the spring 50 has been compressed inwardly by the passage of the operating stud 36. This controlling mechanism, while shown as an ad junct of my invention, is only auxiliary thereto and may be modified in many ways to accomplish substantially the same results.

l claim as my invention:

l. The combination, with a tire-box, ,of means for automatically dumping and closing it, means for automatically admitting a fresh supply of fuel thereto when closed, and means for automatically igniting the fresh fuel so delivered.

2. The combination, with a fire-box, of means for automatically dumping and closing it, means for automatically *admitting a fresh supply of fuel to said box when closed, means for automatically igniting the fresh fuel so admitted, and means for creating a forced draft through said fire-box.

3. The combination, with a fire-box, of means for automatically dumping and clos ing it, a hopper having means for admitting fresh fuel therefrom into said box, means for delivering fresh fuel to said hopper and mechanism for operating said box dumping and closing means and said fuel admitting means successively, and means for automatically igniting the fresh fuel in said box.

4. The combination, with a fire-box, of means for automatically discharging the ashes therefrom, a hopper arranged to deliver fresh fuel to said fire-hox and means controlled by the delivery of said fresh fuel for automatically igniting the fuel in said box. i'

5. The combination, with a fire-box, of means for automatically delivering a fresh supply of solid fuel thereto and mechanism controlled by the delivery of such fresh supply of solid fuel for automatically igniting said fuel.

6. The combination, with a fire-box having means for discharging ashes, of a hopper having means for admitting fresh fuel to said fire-box, an elevating device for de- 'livering fuel to said hopper, means for automatically igniting the fresh fuel in said hopper, and mechanism actuated through the movement of said elevating device for successively admitting fresh fuel to said fire-box and operating said igniting means.

7. The combination, with a fire-box having a dumping means, and means for delivering fresh fuel thereto, of mechanism for operating said dumping means and said fuel delivery means automatically and vsuccessively, and a burner arranged to automatically project a flame into the fresh fuel in said box following the dumping and fuel delivery operations.

8. The combination, with a iirebox having means for discharging ashes therefrom and means for admitting fresh fuel thereto, of mechanism for operating said ash discharging means and said fuel admitting means automatically and successively, a gas burner arranged to automatically project` Va heating apparatus connected therewith and a fan for creating a suction through said heating apparatus and said fire-box, of means for automatically dumpingy said firebox and delivering fresh fuel to said box and means for subsequently projecting a gas flame into said fuel, for the purpose specified.

10. In combination with a heating apparatus having a tortuous passage therethrough for the products of combustion, a fire-box connected with one end of said tortuous passage, asuction fan connected with the other end of said passage, means for automatically discharging the ashes from said firebox and admitting fresh fuel thereto, and automatically projecting an igniting flame into said fresh fuel.

In witness whereof, I have hereunto set my hand this 23rd day of November 1921.

CARLOS W. BREWER. 

